Eyeglass construction



se ta 1944.

G. E. NERNEY- EYEGLASS CONSTRUCTION Filed July 27, 1940 \INVENTOR 650866 f Meme) BY @M/MEY/WWJ Patented Sept. 5, 1944 UNITED STATES PATENT OFFICE EYEGLASS CONSTRUCTION Application July 27, 1940, Serial No. 347,888

2 Claims. (01. 88-47) This invention relates to eyeglass construction.

One of the objects of this invention is to provide an eyeglass construction which may be easily and economically manufactured. Another object is to provide an eyeglass construction of the above character which will be pleasing in ap pearance. Another object is to provide an eyeglass construction of the above character which will be simple, thoroughly practical, and durable. Another object is to provide an eyeglass construction of the above character which is particularly durable in withstanding shocks and strains to the lens hole thereof. Other objects will be in part obvious and in part pointed out hereinafter.

The invention, accordingly, consists in the features of construction, combinations of elements, and arrangements of parts, all as will be illustratively described herein, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawing in which is shown one of the various possible embodiments of this invention, the figure is a transverse section taken through a portion of a lens showing certain features of my invention.

As conducive to a clearer understanding of certain features of this invention, it might here be pointed out that during the drilling of a lens hole, the adjacent lens surfaces receive thousands of percussions from the drill. These percussions result in a multitude of small conchoidal fractures to the adjacent lens surfaces which, at the end of the drilling operation, do not visibly affect a lens. At a later time, when an eyeglass frame that it fuses at a temperature below that at is twisted when in use, it often causes the lens screw to either exert a jacking action between the sides of the lens hole or to strike against one side thereof. Either of these may act against a minute conchoidal fracture to increase its size and thus visibly damage or break a lens. It is another object of this invention to provide a construction for overcoming the above-mentioned difiiculties.

As pointed out hereinabove, movement of a lens screw with relation to a lens hole very often causes damage either through exerting a "jacking action between the sides of the lens hole or by striking directly against them. The construction shown in the drawing, in which the screw l6, which is adapted to receive nut 20, is secured within lens hole I4 in lens Ill by means of ceramic paint l1, prevents this. In this construction, lens hole I4 is counterbored atone end to receive screw head l5. Next, the-sides of the lens hole, the adjacent faces of lens l0, and screw head l5 are given a coating of ceramic paint. Then the screw is placed in the lens hole.

Next, the lens is placed in an oven and raised to sufficient temperature to fuse the ceramic paint to the glass. The paint is of such a type which the glass of the lens would be softened. Thus, this fusing does not cause the lens to lose its adjusted curvature. During the fusing step, the paint enters the minute conchoidal fractures in the side wall of the lens hole, forming a bond between the sides of the fractures securing the two upper edges of each fracture together.

The heat fuses the paint to the screw and to the lens and thus, the paint both seals the fractures in the lens hole and securely and firmly holds the screw therein. Thus, the screw cannot move in hole [4 and breakage resulting from movement of the lens screw within the lens hole is eliminated. Furthermore, with this construction, a firmer connection is made between the eyeglass lens and the frame.

It will thus be seen thatI have provided a thoroughly practical and efiicient construction in which the several objects hereinabove mentioned, as well as many others, are successfully and practically accomplished.

As many possible embodiments may be made 0 the aboveinvention, all without departing from the scope of the invention, it is to be understood that all matter hereinabove set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

I claim:

1. In eyeglass construction, in combination, a glass lens having a drilled lens hole therein, a screw extending through said hole having an enlarged head, and ceramic paint filling the Void between said screw and said hole and covering said screw head, said ceramic paint being bonded to the glass lens, the bond having the characteristics resulting from heating the glass lens and ceramic paint to a temperature at which the ce-, ramic paint bonds to the glass lens but which is lower.than the minimum temperature capable of altering the curvature of. the lens, whereby said ceramic paint seals the conchoidal fractures caused in the side wall of said hole by drilling and also securely mounts said screw in said hole.

2. In eyeglass construction, in combination, a glass lens having a drilled lens hole therein, a screw extending through said lens hole, said lens hole being of greater diameter than said screw, and ceramic paint filling the void around the portion of said screw extending through said lens,

said ceramic paint being bonded to the glass lens, the bond having the characteristics resulting from heating the glass lens and ceramic paint to a temperature at which the ceramic paint bonds to the glass lens but which is lower than the minimum temperature capable of altering the curvature of the lens, whereby said paint seals the conchoidal fractures in the side wall of said hole caused by drilling and also securely mounts said screw in said lens hole.

GEORGE E. NERNEY. 

